Electric fluid-heater.



W. H. FX.

ELECTRIC FLUID HEATER.

Arrmouron Hmm AUG. a, 1912.

Patented Iuly 15I 2 sHBnT-SBBET 1.

y INI/ENTOR W #ff-Fax W] T NESSES A Homey W. H. FOX.

ELECTRIC FLUID HEATER.

APPLIUATIOITv FILED A'UGl 8, 1912. 1,067,647, Patent-,ea Ju1y'15, 1913.

2 SHEETS-SHEET 2.

UNiTED sTA'rns PATENT oFFrcE.

WILLIAM H. FOX, OF MINNEAPOLIS, MINNESOTA.

ELECTRIC From-HEATER.

Specification of Letters Patent.

l ratenteauuiy 15, 191s.

Application tiled August v8, 1912. Serial No. 714,091.

To all whom t may concern.'

Be it known that I, WiLLIAM H. Fox,`a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in ElectricFluid-Heaters; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as. will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in electrical liquid heatingmeans and more particularly to an electrical water' heater,-

the object of the invention being to con'- struct a heater which shallbe simple and radiator sections.

With this object in view, the invention consists in certain novelfeatures of construction and combinations lof parts as hereinafter setforth and pointed vout in the claims.

In the accompanying l is a view showing a portion of a building insection and illustrating the application of my improvement to the-watereating system in the building. Fig. 2 is an enlarged sectional view,partly broken away,.of the heater, and Fig. 3 is a horizontal sectionalview on the line a2-w of Fig. 2.

1 represents the piping of a hot water heating system'in which aplurality of radiators 2 are connected and the usual-'expension tank 3may be employed. -In the circuit of the piping system, a plurality of myimproved electric water heaters i will be connected,-'one of suchheaters beinglocated in proximity to each radiator 2.

In constructing, the heater I employ an outer shell 5 provided at itslower end with a basehead or plate 6 having at its peripheral edge anupturned iiange 7 which is threaded interiorly to screw on the threadedlowerend of said outer shell 5. The shell 5 is also threaded exteriorlyat its upper endA to receive the internally threadedlower end of anupper head 8 having an inwardly prodrawings, Figure 1' jecting portion9a lat itsupper endwhich is threaded :to receive the upper end of aninner shell 9.. The shell l9' is spaced inwardly from the shell 5 toform a water space 10 and said shell 9 also forms the inner wall of alarger chamber 11, the outer and 11p-per walls of which latter yareformed lby the head 8 Iand its inwardly projecting portion 9a. `Thebottom 1'2 of the inner shell 9 terminates an appreciable dis-tanceabove the base 6 and forms with the latter and with the lower portion ofthe shell 5, a chamber 13 with which a water inlet pipe 14 communicates.The head 8 is provided with a hollow boss or .enlargement 15 with whichan outlet pipe 16 communicates. pipe is connected, as 4shown in Fig. 1with the inlet of the radiator and the .outlet of the latter isconnected with the inlet pipe 14 of the hea-ter, with which latter thesupply pipe of the pipe system is also connected;

The space'within the inner shell 9 constitu-tes aheating chamber 17 inwhich a plurality of electric heaters are located. Each electric heatercomprises aI tube 18 of porcelain or other-.electrical non-conductingmaterial and is provided exteriorly with a spiral groove which receivesthe resista-nce conductor constituting the heating medium, theseconductors bei-ng indicated at 19. The

This outlet several tubes 18 of the heaters are dispo-sed betweeninsulatingblocks or disks 20 .and 21,-.-the latter havin-g adiameterappreciably less than the internal 'diameter of the shell \9 so as topermit any moisture which may to find its way to .the bottom of saidchamber as clearly` show-n in Fig. '2. The supporting ibe condensedwithin the heating chamber 17,

blocks or disks for the heaters are themselves lsupported by 'a'centrally located rod 23,

thelower end of which is. stepped vin an insulating block 24 mounted ina socketat v the center of the bottom 12 of the shell 9.

The rod 23 is threaded at its lower portion for the accommodation ofnuts 25-26 disposed respectively above and below the lower supportingblock 21 to holdthe .lat-

ter in position. The upper portion of#v the rod 23 is also screwthreaded to receive nuts 27 between which the blockA ondisk 2O issecured. The rod 23 projects upwardly an .29a and above the block 28 .an'insulating u v disk 29 is located and secured to the rod 23 the head 8.A suitable number of binding' posts 32 vare secured to the block or diskV20 and the latter maybe provided with passages for wires leading fromthe heating ,coils to these binding posts. lllie upper disk 29v has alsosecured thereto a plurality of f binding posts 33 and this disk isprovided with passages for the accommodation of wires 34e which connectthe binding posts 32 with the binding posts 33 and the largeintermediate block orvdisk 28 is also provided with suitable passagesfor the accommodeF tion of these wires.

-A cap or cover 35 incloses the disk 29 and vthe depending flange ofthis cap or cover is removably secured to the head 8 of the heater.Thiscap is provided centrally with a suitable opening 36 through whichwires, connected wlth the binding post 33, may be passed andconnected'at their upper ends with any suitable switch (which may belocated upon said cap) constructed to successively cut in or out ofcircuit the several electrical heating elements so as to thereby controlthe temperature and consequently the degree of heat which it may bedesired the wat-er shall furnish. This switch may be of the typecommonly employed with rheostats.

It will be observed that with -my improvements, the parts are not onlycompactly arranged, but a large extent of heating surface for the wateris adorded and a large heating chamber surrounded by the water to beheated is provided,

Provision is also made .for the ready removal of the heating meanswithout disturbing the general water connections.

Having fully described my invention what I claim as new and desire toVsecure by Letters-Patent, is: 1. In an electrical water heater, thecoming witnesses.

noemerbin'ation with two, concentric shells spaced one from theother/and forming between them a water chamber provided with. an inletand an outlet, of a head disposed in the upper end of the inner shell, acentral rod secured ,to said head, disks adjustably mounted on andsupported by said rod, and

yelectric heaters Ydisposed between saidy disks and supported thereby.

2. In an electrical water heater, the co-mbination with two concentricshells forming a water space between them provided with an inlet and anout-let, of two disks located within the heating chamber `formed by theinner shell, electric heaters disposed between said disks, arod'removably disposed in the inner shell, meansforv clamping said disksadjustablyto said rod, electrical connecting l water space communicatingwith the rst mentioned water space,'and an outlet port communlcatingwith the space within said head, cfa rod disposed in the inner shell,

disks secured to said rod, electric heaters supported between saiddisks, a disk supported on said head] and disposed within the innershell, another disk. supported by the rod above said last mentioneddisk, electrical connections associated with said disks,

and a cap secured to the head and covering the upper disk and theelectrical connections associated therewith.

In testimony whereof, I have signed this specification in the ypresenceof two subscribv WILLIAM H. FOX. Witnesses -MICHAEL V. Heckmann,

FRED. D. MERRILL.

